Holder for electric-heater coils



Aug. 18, 1925. 1,549,773

L. P. HYNES v HOLDER FOR ELECTRIC HEATER COILS Filed April 8. 1924 awumtoz Patented. Aug. 18, 1925.

warren STATES PATENT OF FICE.

LEE r. HYNES, or ALBANY, NEW YORK. l

HOLDER FOR ELECTRIC-HEATER. COILS.

Application filed April 3, 1924'. Serial no. 704,939.

' To all whom it may concern:

Heater Coils, the following being a full,

clear, and exact disclosure of the one form of my invention which I at present deem preferable.

For a detailed description of the present form of my invention, reference may be had I to the following specification and to the ac- Y may holders.

companying drawing forming a part thereof, wherein- Fig. 1 shows a series of holder sections in position;

Fig. 2 is a cross section through the retainer holes;

Fig. 3 is an end view of a terminal section partly cut away;

Fig. 4 is a section through the coll-retainer holes; v Fig. 5 is an enlarged view of the coil retaining means;

Figs. 6 and 7 show typical modes of using My invention relates to refractory holders, or mounting units for electric heating coils, particularly designed for heaters of the radiant and radiant-convection types. My purpose is to provide a universal form of holder which may be employed in all forms of electric heaters of these two types. The holder-unit consists of a shallow block of refractory. material such as porcelain. This unit is conveniently, made six inches long,two inches wide and three-quarters of an 1noh deep. In the drawings a series of such units are shown at A, A, A, in Fig. 1. On the rear side are formed two projecting posts B B, one-quarter of an inch long on which the holder is seated and on the front face' are two longitudinal and parallel V- grooves C C half an inch wide, one-quarter of an inch deep with their adjacent edges spaced half an inch apart. Through such posts passes a hole F for an attaching screw, this hole extending through to the front face of the holder and enlarged to contain the head of the screw and its seal. In the bottom of each groove at intervals of two inches are openings G 'G Passing through to the back of the holder or receiving the split-pins or staples K by which the coil is retained in place onthe holder. The dimensions I have given are those which I have found most suitable for a-holder capable of general use in all forms of heaters wherein radiant or radiant-convectioncoils are mounted on a metallic base but my invention is not restricted to those figures.

In practice a series of the aforesaid units will betplaced end to end for as long a distance as may be desired, all being seated in line on a metal plate but spaced from the plate by the seating posts through which pass the screws that secure the units to the plate. The coils will be laid in the V- grooves as shown in Figs. 1 and 5 and re-.

tained therein by the said split-pins or staples K which loop over the wire of the coil and after passing through the holes G G are bent over at their ends as shown in Fig. 5. The end sections A A are formed with a flat extension I) on which are seated the connection posts E. s

Examples of heaters constructed by eniploying the holders aforesaid are shown in Figs. 6 and 7. In Fig. 6 P represents a shallow sheet-iron box set in flush with the wallof a'room and provided with acoversheet Q. On the bottom of box Pare secured four rows of the unit sections A with the coils secured in the V-groovesas above described.

Since these units are only three-quarters of an inch deep, the total-depth of the heat-' er shown in Fig. 6 is but two inches. In Fig. 7 R represents a bell-shaped casting of thin metal with afiat top on which are se-.

cured three rows of holder-sections A. 'I his device is employed for immersion to any desired depth in water for-thawing or drying wet places.

Although the heater coils are exposed on the under face of the holders A A A their insulation remainsperfect, since air will be trapped in the impervious bell R as in a diving bell and keep the water from the coils. Wherever used the grooves of the unit sections A A A will reflect the radiant 1porcelains, it being uny glassed form of porheat away from'the derstood that a high celain is used. The shape of the grooves allows" the round coils to be seated therein with merely a tangential contact of the wire with the porcelain, whereby a minimum surface area of the coil is covered. The area thus covered is so minute as to be a neglible factor in preventing escape from the coils of the heat which is constantly being generated therein. Moreover, the pins laced in the grooves at intervals to secure t e coil l. A coil-holder for an electric heater;

composed .of a series of flat sections of refractory material placed end to end, the sections having parallel longitudinal grooves on their outer faces in line with corresponding grooves in succeeding sections to receivea coil extending over a series of sections.

2. A coil-holder for an electric heater composed of a series of flat sections of refractory material placed end to end, the sections having on their outer faces aligned grooves of V-shape to receive coils of different diameters.

3. A coil-holder for an electric heater composed of a series of fiat sections of refractory material plated end to end, each section being provided with individual seating projections on its rear side to space it from the underlying support and grooved on its front side in alignment with corresponding grooves in succeeding sections.

4. A coil-holder for an electric heater composed of a series of fiat sections of refractory mate-rial placed end to end and grooved to receive a coil extending over several sections, with individual spacing projections on the rear of the several sections to space them from a common support, said projections being perforated to receive attaching devices.

5. A coil-holder for an electric heater comprising a series of flat sections of refractory material placed end to end and grooved to receive a continuous coil, each section having a coil-retaining device extending through to its rear side and individual means on its rear side for spacing the rear of said retaining device from'an underlying support.

'6. An electric heater comprising a sheetmetal base, a coil-holder permanently secured thereto comprising a series of fiat sections of refractory material seated on said base end to-end and provided with aligned grooves on their outer faces, together with continuous coils secured in said grooves and extending over a succession of se:tions.

7. An electric heater comprising a flat sheet-metal base, a coil holder seated on said base composed of a series of fiat sections of refractory material placed end to end but individually secured to the base with projections spacing it therefrom, and heating coils extending over a series of sections in aligned grooves formed in the face of each section.

8. An electric heater comprising an openbottom, tight-sealed, metallic shell with insulated heating coils contained in the upper part of the interior chamber of said shell above the water line.

9. An electric heater comprising a series of holder-blocks placed in line end to end and each independently supported on an underlying base, the said blocks having aligned coil grooves on their outer faces.

Signed at Albany, county of Albany and State of New York, this 5th day of April, 1924.

LEE P. HYNES. 

